PDF malware analysis — malicious · 5283b90d55c195e8

MALICIOUS

PDF

45.4 KB

MD5: ea604ed7bd5226f0511a4bec7c18aa7a SHA-1: d143341ffc997979b7f93c083d45e1ef00cef73e SHA-256: 5283b90d55c195e84ba074c4680a1885a1de32425822c8cc98439c481d762515

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. A critical heuristic, 'CVE_2007_5659', specifically points to the use of 'collab.collectEmailInfo' to trigger an exploit, likely related to Adobe Reader. The presence of U3D content and a 'PDF_U3D_CVE_RELATED' heuristic further suggests exploitation of a 3D rendering vulnerability. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Heuristics 6

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `13e428efbba6d9f497c253ef53ac3f08561c5f9f3f489b4e0fd8def3952ba1fd`	pdf-javascript-stream	PDF /JS object 9 at offset 0x46CF	539 bytes
`legacy_pdfkit_stage_000.js` `2f1126628aee1f40e73cdf9071f420bdfd350dd7c0dcda7b7bd76dadb2fff5c1`	deobfuscated-js	z-percent UTF-16BE base-21 decoded JavaScript at offset 0x1C1E	5568 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`deobfuscated.js` `1d313b46430416c7efc7353b4ff45dab021ad4e82c18f3d648fd6bb0b211a386`	deobfuscated-js	PDF JavaScript deobfuscation pass	257772 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off00004931.bin` `a96e1fca2499edf504d3934052ca1fc338d4b4898a65e6a361937ed1ba0dc0fe`	pdf-3d-stream	PDF U3D 3D stream at offset 0x4931	28021 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.79, consistent with packed or encrypted content.

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